ALEXANDRIA, Va., June 4 -- United States Patent no. 12,318,612, issued on June 3, was assigned to BioWave Corp. (Norwalk, Conn.).

"Electrotherapy and neurostimulation medical device apparatus and method" was invented by Bradford Siff (Norwalk, Conn.) and John Carter (Belle Harbor, N.Y.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method and apparatus are disclosed for providing therapeutic electric current to a treatment site of a patient. The steps of the method comprise generating a first and second signal having a frequency difference between 1 Hz and 300 Hz, wherein each signal has a frequency of at least 1 KHz and are amplified by Class D switching amplifiers, minimizing the DC component of the firs...